Martin moller



(No Model.) M. MOLLER.

Corn Grinding Mi l'l. N o.fl232,536. Patnted Sept-21, 1880.

UNITED STATES PATENT OFFICE.

MARTIN MGLLER, OF KOLLMAR, GERMANY.

CORN-GRINDING MILL.

SPECIFICATION forming part of Letters Patent No. 232,536, dated September 21, 1880. Applicationfiled April 24, 1880.- (N model.) Patented in Germany April 10, 1879.

' corn or other coarse materials in which a grooved roller or drum is rotated in proximity to a bed or jaw, so as to crack, crush, or grind the material between the roller or drum and bed or jaw. I

The invention consists in the combination, with the grinding-cylinder, of the bed secured within a shackle, a vertical spring supporting the shackle which carries the bed, and a horizontal adjusting-screw arranged to regulate the tension of the spring; also, in the combination, with the grinding cylinder or drum, of the bed secured within a shackle by means of set-screws, a vertical spring supporting the shackle which carries the bed, amovable holder or casing for the shackle, and a hand-wheel for adjusting said shackle-holder, all as hereinafter set forth and claimed.

The accompanying drawing represents a g partial section and side elevation of a millembodying my invention.

A designates a roller or drum arranged upon an approximately horizontal axis, A; and B designates the bed or jaw, which, in conjunction with the drum or roller, effects the grimling, crushing, or cracking of material. The drum or roller is grooved transversely across its face, preferably, so as to form ratchet shaped teeth a, while the bed is composed of alternate plates of iron I) and intermediate plates of steel 0, projecting beyond the edges of the iron plates and formingthe grinding-surface. The several plates of iron and steel are securely clamped in a shackle, d, by means of set-screws c, and the shackle is represented as attached to one end of a bent spring, f, the

tension of which may be regulated by an adjusting-screw, g. The shackle d is shown as held in a holder or casing, h, and by turning the hand-wheel "i the bed or jaw may be adjusted toward and from the drum or roller and held in any desired position.

When desired, the bed or jaw can be moved entirely away from the roller or drum by an eccentric or cam, j, upon a rotary shaft, is, which may be turned to bring the eccentric or cam to bear upon the spring f.

G designates a hopper, from which the material passes to the roller or drum A and bed or jaw B. In order to provide for a steady and uniform feed to the hopper O, I preferably employ a second hopper, D, the outlet of which is closed by an adjustable gate, 1, which may be raised or lowered by a shaft, m. The open lower end of the hopperD is closed by an endless belt or apron, 12, mounted upon rollers 0, the tension of the belt or apron being maintained by a spring, 19, acting to draw the rollers 0 apart, and provided with an adj ustin g-screw,

g, by whichits force may be regulated.

The several parts of my mill are mounted in or upon a suitable frame-work, E, and motion may be imparted to the several movable parts in any desired manner.

When the gate Z is open the corn or other material to be ground, falling upon the belt or apron a, is carried forward and deposited in the hopper 0, from whence it passes downward between the roller or drum A and bed B.

The bed B, when constructed of plates of iron and steel, is very readily made. Any of the plates may be readily renewed, and as the steel plates become worn they may be moved outward and newly secured in the shackle, thus dispensing with the necessity of sharpening or dressing the surface of the bed.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with the grinding cylinder or drum A, of the bed B, secured within a shackle, d, the vertical springf, supporting the shackle which carries the bed, and the horizontal adjusting-screw g, arranged to regulate the tension of the spring, substantially as described.

2. The combination, with the grinding cylinder or drum A, of the bed B, secured within a shackle, d, by means of set-screws, the vertical spring f, supporting the shackle which carries the bed, a movable holder or casing, h, for the shackle, and a handwheel, i, for adjustin g the said shackle-holder, substantially as described.

In testimony whereof I have signed my name to this specification in the presenceof two subscribing witnesses. 

